@article{JMLR:v19:16-432,
  author  = {Mateo Rojas-Carulla and Bernhard Sch{{\"o}}lkopf and Richard Turner and Jonas Peters},
  title   = {Invariant Models for Causal Transfer Learning},
  journal = {Journal of Machine Learning Research},
  year    = {2018},
  volume  = {19},
  number  = {36},
  pages   = {1--34},
  url     = {http://jmlr.org/papers/v19/16-432.html}
}